Jeff has DSL and lately it's been really slow. Leo says that outside, about 2 miles from the hub, DSL is just unusable, which is why cable is a better option. The cable company tech added an "attenuator" on his line, which is designed to protect devices if the cable has too much of a signal. It doesn't affect speeds, it just protects electronics. Just leave it on, especially with 400 MBps!